diff mbox series

io_uring: mark reissue requests with REQ_F_PARTIAL_IO

Message ID 82c8a718-cf1d-d40f-f501-34e3f384d77b@kernel.dk (mailing list archive)
State New
Headers show
Series io_uring: mark reissue requests with REQ_F_PARTIAL_IO | expand

Commit Message

Jens Axboe June 20, 2022, 12:41 p.m. UTC 
If we mark for reissue, we assume that the buffer will remain stable.
Hence if are using a provided buffer, we need to ensure that we stick
with it for the duration of that request.

This only affects block devices that use provided buffers, as those are
the only ones that get marked with REQ_F_REISSUE.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

---
diff mbox series

Patch

diff --git a/fs/io_uring.c b/fs/io_uring.c
index d3ee4fc532fa..87c65a358678 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -3437,7 +3437,7 @@  static bool __io_complete_rw_common(struct io_kiocb *req, long res)
 	if (unlikely(res != req->cqe.res)) {
 		if ((res == -EAGAIN || res == -EOPNOTSUPP) &&
 		    io_rw_should_reissue(req)) {
-			req->flags |= REQ_F_REISSUE;
+			req->flags |= REQ_F_REISSUE | REQ_F_PARTIAL_IO;
 			return true;
 		}
 		req_set_fail(req);
@@ -3487,7 +3487,7 @@  static void io_complete_rw_iopoll(struct kiocb *kiocb, long res)
 		kiocb_end_write(req);
 	if (unlikely(res != req->cqe.res)) {
 		if (res == -EAGAIN && io_rw_should_reissue(req)) {
-			req->flags |= REQ_F_REISSUE;
+			req->flags |= REQ_F_REISSUE | REQ_F_PARTIAL_IO;
 			return;
 		}
 		req->cqe.res = res;